Dandruff is the shedding of dead skin cells from the scalp. They can be seen as white flakes on the hair.
Diarrhoea is the condition of having at least three loose or liquid bowel movements each day due to bacterial and viral infection.
It is defined as difficulty in breathing along with shortness of breath due to causes largely related to the heart and the lungs.
Dizziness is a term used to describe a range of sensations e.g. feeling faint, woozy, weak or unsteady due to causes such as an ear infection.